I did some reading on here about coccidiosis and I don't think that's what she has based on the lack of blood in the stool, but you tell me. She slept in the floor level nesting box last night and when I went to let them free range this evening just hung inside the coop then went back to the box. There's no blood in the poop on her butt or in what I've seen her do, but it is very liquidy. Her vent is not blocked.
This is a weird observation but her iris seems more red colored whereas the other hens and the rooster are all yellow. Her eyes are clear they don't seem cloudy or red elsewhere in the eye.
I've also discovered in the past week that I have what I think are mites in the nesting boxes. Tiny fast moving brown things that end up on my hands and forearms when I reach in there. They hide under sleeve edges and whatnot. When I cleaned out the coop today I dusted the boxes with dry dirt and wood ash.
I also dusted the hen with dry dirt and moved her into a dog crate in the house for the night, although when I reached in the crate to move her again so she could see the water I got the little buggers on me again, so I don't know. I hope they don't get anywhere else in the house I just had to make a decision with dusk coming on. Just put a little sugar water in there with her. She just seems to want to rest with her head in the corner.
I had another RI red die a few months back in the fall. Can't remember its behavior beforehand, just found it dead in the pen one day and disposed of it. That was the first chicken I've had die in 3 years and I've never had a problem with a sick bird before or since.
Sorry for the rambling but I'm not really sure if the bugs are connected or not with no other birds being sick. Just looking for any ideas. Thanks.